Hadesty



(No Model.)

G. W. HADESTY.

TAMPING BAR.

No. 337,492". Patented Mar. 9, 1886.

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UNITED STATES PATENT UEEICE.

GEORGE VASHINGTON HADESTY, OF DRIFTON, PENNSYLVANIA.

TAM PING. BAR.

SPECIFICATION forming part of Letters Patent No. 337,492, dated March 9, 1886.

Application `filed January 16, 1886. Serial No.'188,771. (No model.)

Toa/ZZ whom, it may concern.:

Beit known that I, GEORGE WASHINGTON HADESTY, a citizen of the United States, residing at Drifto'n, in the county of Luzerne and State of Pennsylvania, have invented a new and useful Improvement in 'Damping-Bars, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to an improvement in tamping-bars to be used in blasting and mining; and it consists in the peculiar construction and combination of devices, that will be more fully set forth hereinafter, and particularly pointed out inthe claims.

In the drawings, Figure l is an elevation of my :invention in position for use and extended toits full length. Fig. 2 is a vertical longitudinalsectional View of the saine contracted. Figs. 3 and 4 are transverse views taken on the lines x and y y, respectively.

In blasting rock and coal in mining it is usual to drill the hole, place the powder or other explosive therein, and then place dirt or sand on the powder in the hole, and tamp it firmly therein before igniting the explosive, in order to cause it to explode with suflcient violence to shatter the rock or coal bed.

The object of my invention-is to provide an apparatus for tamping the dirt or sand more expeditiously than has been heretofore done.

A represents a cylindrical tube of any suit- A able diameter and closed at one end. On one side ofthe tube is a slot, B, which extends nearly. the entire length of the tube, and on the opposite side is a shorter slot, C. A notch, D, communicates with the slot B at a suitable distance from 'the closed end of the tube, and the' said tube is also provided with stops E.

F represents a cylindrical case, which is open at both ends and fits on the closed end of the tube. A transverse bar, f, passes through the inner end of the case F, and extends transversely through the tube and works in the slots B C. A rod, f is attached to the barf, extends through the tube for a suitable distance, and has its outer end bent at right angles, as at f 2, and extending out through the slot B. Awcoiled retractile, spring, G, in the tube A, has one end attached to the outer end of the barf and its other end attached to the open end of the tube A. By this construction it is plain that the case F can be drawn outwardly on the closed end of the tube telescopically and against the tension of thesprng, as shown in Fig. l, and maintained in that position by pressing the endf2 of the rodf,which forms a detent, into the notch D.

When the hole is drilled and the charge of explosive inserted, the extended case F is filled with earth and inserted in the hole, and held therein with one hand,vand the miner releases the detent from the notch D, which causes the spring to force the closed end of the tube through the case F and discharge the earth contained in the case into the drilled hole and onto the explosive contained therein. As soon as the earth is discharged into the hole, it is then pressed or tamped firmly therein by pressing upon the outer end of the tube and before withdrawing it from the hole. The operation of filling and tamping the hole is thus performed very expeditiously.

A concave groove, e, is made in one side of the case F, coincident with a similar groove in the closed-end of the tube. The function of the groove e is to rrceive the blasting-fuse, as shown in Fig. 2. The closed end of the tube forms a plunger, working in the case F.

Having thus described my invention, I claiml. In atampiug-bar for drillholes, the combination of the case F aud the spring-actu ated plunger therein, for the purpose set forth, substantially as described.

2. In a taniping-bar for drill-holes, the combination of the case F. the-spring-actuated plunger therein, and the detent to lock the plunger tothe case when the plungeris extended, substantially as described.

3. In a tamping-barfordrill-holes, thecombiuation of the case having the groove ein its side to receive the fuse, and the plunger working in the case, for the purpose set forth, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

GEORGE WASHINGTON HADESTY.

Witnesses:

ELLIOTT A. OBERRENDER, GEORGE A. SOLT. 

